The Russian flag flies on the dome of the Kremlin Senate building behind Spasskaya Tower, in central Moscow, Russia, May 4, 2023. REUTERS/Stringer/File Photo Acquire Licensing RightsAug 17 (Reuters) - A Moscow court has arrested an already imprisoned Russia-born U.S. citizen on charges of espionage, Russian news agencies reported on Thursday. Russian news agencies did not report any details of the new charges, but said the court session was held behind closed doors as the case materials were classified. Speaking on CNN, White House spokesperson John Kirby said the administration was still collecting information about the case and had no comment yet. Reporting by Maxim Rodionov, Kanishka Singh and Lidia Kelly; Editing by Chris Reese, Daniel Wallis and Raju GopalakrishnanOur Standards: The Thomson Reuters Trust Principles.

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Persons: Stringer, Gene Spector, Arkady Dvorkovich, Spector, John Kirby, Maxim Rodionov, Kanishka Singh, Lidia Kelly, Chris Reese, Daniel Wallis, Raju Gopalakrishnan Organizations: Kremlin Senate, REUTERS, TASS, Medpolymerprom, CNN, White, State Department, Thomson Locations: Russian, Kremlin, Moscow, Russia, Russia's St, Petersburg, United States